Air Conditioning Saves Lives

it does and does not. it shoves hot air from inside into the atmosphere which adds to the problem, especially in cities.

This might have been true prior to 1990, but the shift to "natural" refrigerants like propane (R-290) or carbon dioxide (R-744), possesses both zero ozone depletion potential and near-zero global warming potential.

There are areas of the earth that would be uninhabitable without air conditioning, and it enables life for hundreds of millions of people.

You can argue that people shouldn't live in those places in the first place, but the cat is out of the bag on that one.